I haven't used my LNL an extensive amount yet but "76highboy reloading" on youtube has made a bunch of extremely well thought out videos on how to set them up for smooth functioning. Before I even set up the press I took an hour or two and watched all his videos and then watched them again while setting it up and so far everything has worked great. This is my first progressive press and I got it used in poor condition so the videos really worked for me. The guy is one of those people who has a knack for teaching and the videos are very well done with good lighting, clear shots of details etc.
You mentioned having trouble with the priming system and he covers that in great detail in part 2. Here is a link: https://www.youtube.com/watch?v=w6BfPn5QaiA It sounds like you may possibly have a bent cam wire if it is coming out of the plastic top retainer every other cycling. When I got my lnl (used) the cam wire was bent and I would have thought the system was worthless if I had not rebent it. In retrospect that is probably why the previous owner got rid of it. The exact positioning of the cam wire top retainer (set once and don't change) is absolutely critical to primers feeding correctly, so if your top retainer is moving you'll have frustrating problems I think. The video shows exactly how to set the cam wire position around the 17 minute mark and I would really recommend watching that.
You can view a photo of what the cam wire should look like here: https://media.midwayusa.com/producti...662/662855.jpg
If it has any different bends than that, that's most likely the source of your problem.
I see there are upgraded cam wire top retention brackets on ebay but I haven't used them myself, they are only a few bucks so that's another thing you could try as well.
Best of luck, I'm sure you can get that thing running right after watching the videos and then you'll have another useful press on hand.
BP | Bronze Point | IMR | Improved Military Rifle | PTD | Pointed |
BR | Bench Rest | M | Magnum | RN | Round Nose |
BT | Boat Tail | PL | Power-Lokt | SP | Soft Point |
C | Compressed Charge | PR | Primer | SPCL | Soft Point "Core-Lokt" |
HP | Hollow Point | PSPCL | Pointed Soft Point "Core Lokt" | C.O.L. | Cartridge Overall Length |
PSP | Pointed Soft Point | Spz | Spitzer Point | SBT | Spitzer Boat Tail |
LRN | Lead Round Nose | LWC | Lead Wad Cutter | LSWC | Lead Semi Wad Cutter |
GC | Gas Check |